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Finding the Fourth Proportional to 21,957.96, 32,936.58 and 5,317.88

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Solution

The fourth proportional to 21,957.96, 32,936.58 and 5,317.88 is: 7,976.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.96 : 32,936.58 = 5,317.88 : x
  2. Step 2: Convert to fraction form
    21,957.96/32,936.58 = 5,317.88/x
  3. Step 3: Cross multiply
    21,957.96x = 32,936.58 × 5,317.88
  4. Step 4: Simplify right side
    21,957.96x = 175,152,780.05
  5. Step 5: Solve for x
    x = 175,152,780.05/21,957.96
  6. Step 6: Final answer
    x = 7,976.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.